Heat oven to 500&deg;F.,Peel avocados and cut into slivers.,Squeeze the juice out of half the lemon onto the avocado slivers and keep in a bowl.,Cover a baking pan with cooking paper.,______,Once cooked, let the cod cool down in a bowl.,Put a skillet on medium-high heat.,When the skillet is hot, heat up the tortillas on each side without toasting them, about 30 seconds each side.,Reserve.,Squeeze the juice of the other half of the lemon on the cod.,Season the cod to taste.,Flake the cod then toss it to evenly cover it with lemon juice, salt and pepper.,Spread a bit of tzatziki in each tortilla.,cover with avocado slivers, cod, and cilantro.,Keep the tortillas folded in half using the bamboo skewers.,Serve in a presentation plate.